3865567 has 2 divisors, whose sum is σ = 3865568. Its totient is φ = 3865566.

The previous prime is 3865553. The next prime is 3865577. The reversal of 3865567 is 7655683.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3865567 is a prime.

3865567 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3865517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1932783 + 1932784.

It is an arithmetic number, because the mean of its divisors is an integer number (1932784).

Almost surely, 2^3865567 is an apocalyptic number.

3865567 is a deficient number, since it is larger than the sum of its proper divisors (1).

3865567 is an equidigital number, since it uses as much as digits as its factorization.

3865567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 40.

The square root of 3865567 is about 1966.1045241797. The cubic root of 3865567 is about 156.9414768286.

The spelling of 3865567 in words is "three million, eight hundred sixty-five thousand, five hundred sixty-seven".